complexType AbstractDatumType

diagram
namespace	http://www.opengis.net/gml
type	extension of gml:AbstractDatumBaseType
properties	base  gml:AbstractDatumBaseType abstract  true
children	gml:metaDataProperty gml:datumName gml:datumID gml:remarks gml:anchorPoint gml:realizationEpoch gml:validArea gml:scope
used by	element  _Datum complexTypes  EngineeringDatumType GeodeticDatumType ImageDatumType TemporalDatumBaseType VerticalDatumType
attributes	Name   Type   Use   Default   Fixed   annotation id required         documentation Database handle for the object.  It is of XML type ID, so is constrained to be unique in the XML document within which it occurs.  An external identifier for the object in the form of a URI may be constructed using standard XML and XPointer methods.  This is done by concatenating the URI for the document, a fragment separator, and the value of the id attribute.
annotation	documentation A datum specifies the relationship of a coordinate system to the earth, thus creating a coordinate reference system. A datum uses a parameter or set of parameters that determine the location of the origin of the coordinate reference system. Each datum subtype can be associated with only specific types of coordinate systems. This abstract complexType shall not be used, extended, or restricted, in an Application Schema, to define a concrete subtype with a meaning equivalent to a concrete subtype specified in this document.
source	<xs:complexType name="AbstractDatumType" abstract="true">   <xs:annotation>     <xs:documentation>A datum specifies the relationship of a coordinate system to the earth, thus creating a coordinate reference system. A datum uses a parameter or set of parameters that determine the location of the origin of the coordinate reference system. Each datum subtype can be associated with only specific types of coordinate systems. This abstract complexType shall not be used, extended, or restricted, in an Application Schema, to define a concrete subtype with a meaning equivalent to a concrete subtype specified in this document. </xs:documentation>   </xs:annotation>   <xs:complexContent>     <xs:extension base="gml:AbstractDatumBaseType">       <xs:sequence>         <xs:element ref="gml:datumID" minOccurs="0" maxOccurs="unbounded">           <xs:annotation>             <xs:documentation>Set of alternative identifications of this datum. The first datumID, if any, is normally the primary identification code, and any others are aliases. </xs:documentation>           </xs:annotation>         </xs:element>         <xs:element ref="gml:remarks" minOccurs="0">           <xs:annotation>             <xs:documentation>Comments on this reference system, including source information. </xs:documentation>           </xs:annotation>         </xs:element>         <xs:element ref="gml:anchorPoint" minOccurs="0"/>         <xs:element ref="gml:realizationEpoch" minOccurs="0"/>         <xs:element ref="gml:validArea" minOccurs="0"/>         <xs:element ref="gml:scope" minOccurs="0"/>       </xs:sequence>     </xs:extension>   </xs:complexContent> </xs:complexType>

XML Schema documentation generated by XMLSpy Schema Editor http://www.altova.com/xmlspy